- You can learn about magpies from this article by National Geographic http://animals.nationalgeographic.com/animals/birding/black-billed-magpie/
- And from the National Park Service http://www.nps.gov/kefj/learn/nature/black-billed-magpie.htm
- This one is from the Cornell Lab of Ornithology http://www.allaboutbirds.org/guide/black-billed_magpie/lifehistory
